Inductor type rotary motor

Abstract

The inductor type rotary motor of m-phase (m represents an integer of 2 or more) includes a stator in which distal ends of teeth are circularly disposed, and a rotor having an inductor tooth that faces each of the distal ends of the teeth through a constant gap. The stator includes k·m teeth (k represents an integer of 1 or more), at least one permanent magnet is disposed at each of the teeth, and adjacent permanent magnets, which belong to teeth adjacent to each other, are disposed in such a manner that different polarities face each other.

What is claimed is: 
     
       1. An inductor type rotary motor of m-phase (m represents an integer of 2 or more), comprising:
 a stator that includes teeth in a circumferential shape; and 
 a rotor that includes an inductor tooth row that faces the stator through a gap, 
 wherein the stator includes k·m teeth (k represents an integer of 1 or more), 
 each of the teeth having only a single permanent magnet aligned with a radial axis and magnetized in a circumference direction, the single magnet being disposed at an inner face of the distal end of each of the teeth, and adjacent permanent magnets that belong to teeth adjacent to each other are disposed in such a manner that different polarities face each other; and 
 the inner face of the distal end of each of the teeth comes into contact with an adjacent tooth through a thin portion without a gap. 
 
     
     
       2. The inductor type rotary motor according to  claim 1 ,
 wherein each of the permanent magnets is inserted into an accommodation hole that is formed in each of the teeth, and 
 the accommodation hole is formed in a plurality of the teeth, which are adjacent to each other, in a circumferential direction with a constant interval. 
 
     
     
       3. The inductor type rotary motor according to  claim 1 ,
 wherein the stator has a structure capable of being divided for each tooth around which a coil is wound, 
 a directional electromagnetic steel sheet is used for a coil winding portion of the tooth, and 
 a magnetic flux passing direction in the coil winding portion and an axis of easy magnetization of the directional electromagnetic steel sheet are parallel with each other. 
 
     
     
       4. The inductor type rotary motor according to  claim 3 ,
 wherein a thickness of the tooth in a lamination direction of the directional electromagnetic steel sheet is smaller than a thickness of the columnar support tooth in the lamination direction of the directional electromagnetic steel sheet. 
 
     
     
       5. The inductor type rotary motor according to  claim 1 ,
 wherein in the stator, a columnar support tooth around which a coil is wound and a tooth around which the coil is not wound are alternately disposed in the circumferential direction. 
 
     
     
       6. The inductor type rotary motor according to  claim 5 ,
 wherein a width of the tooth in a direction perpendicular to the lamination direction of the directional electromagnetic steel sheet is wider than a width of the columnar support tooth in a direction perpendicular to the lamination direction of the directional electromagnetic steel sheet. 
 
     
     
       7. The inductor type rotary motor according to  claim 1 ,
 wherein the rotor is disposed on an inner circumference side or an outer circumference side of the stator through a gap with the stator. 
 
     
     
       8. The inductor type rotary motor according to  claim 1 ,
 wherein the rotor is disposed on an outer circumference side and an inner circumference side of the stator through a gap with the stator. 
 
     
     
       9. The inductor type rotary motor according to  claim 1 ,
 wherein when the number of phases is set as m (m is an integer of 2 or more), the number of the teeth is set as k·m (k represent an integer of 1 or more), and the number of the permanent magnets on the distal end for one tooth is set as n (n represents an integer of 1 or more), the number i of inductor teeth of the rotor satisfies a relationship of 1.5≤(k·m·n)/i<2 or 2<(k·m·n)/i<2.5. 
 
     
     
       10. An inductor type rotary motor of m-phase (m represents an integer of 2 or more), comprising:
 a stator that includes teeth in a circumferential shape; and 
 a rotor that includes an inductor tooth row that faces the stator through a gap, 
 wherein the stator includes k·m teeth (k represents an integer of 1 or more), 
 two or more permanent magnets are disposed at an inner face of the distal end of each of the teeth, 
 adjacent permanent magnets that belong to the same tooth are disposed in such a manner that the same polarities face each other, and 
 the inner face of the distal end of each of the teeth comes into contact with an adjacent tooth through a thin portion without a gap; 
 wherein each of the two or more permanent magnets are substantially aligned with a radial axis and magnetized in a substantially circumference direction; 
 wherein the stator surrounds the rotor. 
 
     
     
       11. The inductor type rotary motor according to  claim 10 ,
 wherein the adjacent permanent magnets that belong to teeth adjacent to each other are disposed in such a manner that different polarities face each other. 
 
     
     
       12. The inductor type rotary motor according to  claim 10 ,
 the magnets are disposed in an inclined manner in order for at least one permanent magnet to be gradually close to the other permanent magnet.